高温下替代砂砂浆中钢筋的性能

IF 1 4区工程技术 Q4 ENGINEERING, CIVIL Gradevinar Pub Date : 2021-05-12 DOI:10.14256/JCE.2931.2020

J. Balasubramanian, E. Gopal, Dhivya Kamaraj, S. Ponnaiah, Prakash Periakaruppan

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引用次数: 0

摘要

本研究调查了火灾、冷却方法和覆盖厚度对12毫米直径钢筋嵌入覆盖30和50毫米覆盖厚度的河砂(RS)替代品(如花岗岩粉和人造砂)砂浆中的行为(强度和延性)的影响。当温度超过500℃时，热应力引起砂浆覆盖层的随机剥落，空冷时钢筋强度下降，延性增加，而水淬时则相反。

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Rebar properties in sand-substitute mortars after exposure to high temperatures

This study investigates the effects of fire, cooling methods, and cover thickness, on the behaviour (strength and ductility) of 12-mm diameter rebars embedded in mortars with river sand (RS) substitutes such as granite powder and manufactured sand, with 30 and 50 mm cover thickness. Beyond 500°C, thermal stress induced random spalling of mortar cover, and tension test results showed strength decrement and ductility increment of rebars for air cooling, while the vice versa was observed for water quenching.

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